The Latest: 'Explosion" raises fears for Argentine sub

People pray for the crew of the missing submarine outside the navy base in Mar del Plata, Argentina, Wednesday, Nov. 22, 2017. Argentine families of 44 crew members aboard a submarine that has been lost in the South Atlantic for seven days are growing increasingly distressed as experts say that the crew might be reaching a critical period of low oxygen on Wednesday. (AP Photo/Marina Devo)